* {padding: 0;margin: 0;}
ol,ul,li {list-style-type: none;}

#content{width: 100%;height: 100%;overflow: hidden;position: absolute;overflow: hidden;}
#content-wrap{position: relative;}
#content-wrap>li{float: left;background: #CAE1FF;width: 100%;height: 100%;position: relative;overflow: hidden;}
#content-wrap li:nth-child(2){background: #9BCD9B;}
#content-wrap li:nth-child(3){background: yellow;}

.button {position: absolute;bottom: 20px;left:50px;}
button {width: 100px;height: 50px;}